We all thinks that Jack ____________ for his son’s bad performance at school.

A．is to blame

B．is to be blame

C．are to be blamed

D．are be blame

第一次明确规定了从业人员安全生产的法定义务和责任的是()。

A.《劳动法》

B.《安全生产法》

C.《工会法》

D.《宪法》